79827931 has 2 divisors, whose sum is σ = 79827932. Its totient is φ = 79827930.

The previous prime is 79827919. The next prime is 79827953. The reversal of 79827931 is 13972897.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13972897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79827931 - 2⁵ = 79827899 is a prime.

It is a super-2 number, since 2×79827931² = 12744997135481522, which contains 22 as substring.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 79827931 parts by 12635 straight cuts.

It is not a weakly prime, because it can be changed into another prime (79827901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39913965 + 39913966.

It is an arithmetic number, because the mean of its divisors is an integer number (39913966).

Almost surely, 2^79827931 is an apocalyptic number.

79827931 is a deficient number, since it is larger than the sum of its proper divisors (1).

79827931 is an equidigital number, since it uses as much as digits as its factorization.

79827931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 46.

The square root of 79827931 is about 8934.6477826493. The cubic root of 79827931 is about 430.5777900699.

The spelling of 79827931 in words is "seventy-nine million, eight hundred twenty-seven thousand, nine hundred thirty-one".